white patches

[marcecarloh]

hello! hope someone can help with some problems on my dendrobiums. my first problem belongs to picture 1 and 2, are 2 different dendrobium orchids it´s a white area in only one leaf on every orchid, it´s very thin and it happens in no more than 24 hours. the day defore I spray them with a product for ants, so i´m not sure if the product did that. my city has a warm weather even at night.

my second problem is picture 3 and 4. in many new growths of many dendrobiums I can see that pattern on the leaves that are like white lines but the orchid looks healthy, it´s a disease or can be lack or vitamins?? or sunlight???

[Paul Mc]

Well, pic one looks like sun burn or the leaves got too hot. Pic two looks like the same with perhaps some cellular collapse. Not an expert in this, but I would think it may have been under watered and not able to cool itself enough.

Pic 3 & 4 both appear to be early signs of being too hot or sunburn to my eye.

Hope someone else can chime in if Im wrong.

[Gage]

Agreed, sunburn.